Examine source code of Infrastructure Overlay

{
  "manifest_version": 2,
  "name": "Infrastructure Overlay",
  "version": "1.0",
  "description": "Reveals the hidden infrastructure behind the websites you visit.",
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a4667ae7-524e-499a-ba22-2acde308038b}"
    }
  }
}